Nios ii custom instruction slave bfm, Nios ii custom instruction slave bfm -1 – Altera Avalon Verification IP Suite User Manual
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Nios II Custom Instruction Slave BFM
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You can use Nios II Custom Instruction Slave BFM to verify the following aspects of the Nios II custom
instruction slave interface:
• Combinational and multicycle slave custom instructions
• Extended instructions
Figure 15-1: Custom Instructions Slave BFM Block Diagram
Physical Instruction
Public Events
Avalon Custom Instruction Slave BFM API
(Transaction Level Commands)
DUT
Slave Interface
Driver
Physical Result
Slave Interface
Receiver
instruction
result
Test Program
The Nios II Custom Instruction Slave BFM does not use queues to manage the instructions or results.
Without queues, the BFM uses events to retrieve the instructions and to drive results. This method allows
greater flexibility in controlling the output result. For example, driving a result when the interface is unknown.
The BFM drives the old result onto the interface if you do not provide a new result for an instruction. If
there is no instruction, the BFM drives unknown (X) on the interface.
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